18. Alexia bought a book that is 252 pages long. She read the book in 3 days. The first day, she read 1/2 of the book's pages, the second day, she read 1/3 of the book's pages, and the third day she read all the remaining pages. How many pages did Alexia read the third day?
Answer: D
Alexia read 252 pages on the third day.
To determine how many pages Alexia read on the third day, we first calculate the pages she read on the first two days. On the first day, she read half of the book, which is 126 pages. On the second day, she read one-third of the total pages, equating to 84 pages. Therefore, the pages remaining for the third day are 252 - (126 + 84) = 42 pages.
A) 3200%
This option is incorrect as it represents a percentage rather than a page count. The total pages Alexia read do not correspond to 3200% of any relevant figure in this context.
B) 3600%
Similar to option A, this choice is also incorrect because it indicates a percentage rather than the actual number of pages read. The calculations of pages read do not lead to a percentage of 3600%.
C) 4000%
This option is incorrect as well, as it refers to a percentage that does not apply to the scenario. The number of pages read does not translate into 4000% of any relevant total.
D) 4200%
This option is incorrect because, like the previous options, it presents a percentage instead of the actual page count. The pages read do not equate to 4200% of any relevant figure.
Conclusion
The correct calculation reveals that Alexia read 42 pages on the third day, which is a straightforward result derived from the totals read on the first two days. All other options incorrectly represent percentages, failing to address the actual question regarding the number of pages read. Thus, the core concept of calculating remaining pages from a total is highlighted through the correct answer.